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The Golden Gate Bridge Highway and Transportation District 700 MHz application, June 2009 Page 1
Region 6 700 MHz channel selection and usage documentation
Version 6
Applicant information
The Golden Gate Bridge, Highway and Transportation District is a Special District formed by theCalifornia Legislature in 1928 to build and operate the Golden Gate Bridge and the 101 transportationcorridor up to the Oregon border. The Legislature expanded this role in 1969 when Golden Gate Transitand Golden Gate Ferry systems were added to its mission. The District’s current jurisdiction includes theCity and County of San Francisco, Marin County, Napa County, Sonoma County, Mendocino County andDel Norte County.
The District is responsible for the protection of life and property within the jurisdiction with emphasis onprotecting the critical infrastructure of the Golden Gate Bridge and protecting the transit passengersutilizing Golden Gate Transit and Golden Gate Ferry. The District is headquartered in San Francisco andits Board of Directors includes nineteen members who represent all six (6) counties.
Documented Funding
The Project 25 700 MHz system proposed by Golden Gate Bridge Highway and Transportation Districtknown as Advanced Communications & Information System (ACIS) is fully funded and contract number2008‐MD‐1 has been awarded to GE Transportation in the amount of $15,455,187 for implementation.Details concerning the funding sources and project scope are attached to this package as the StaffReport presented to and approved by the District Board of Directors meeting on November 24, 2008.
The contract signed by the Officers of the District who have financial authority is also attached to thispackage. Notice to Proceed was issued to GE Transportation on January 5, 2009. The District fullyexpects to have the system completed and operate at its necessary capacity within its initialconstruction period as identified by the FCC, 12 months from the date of license issuance.
The Golden Gate Bridge Highway and Transportation District 700 MHz application, June 2009 Page 2
System description
This Project 25 System will replace and consolidate three aging radio systems with a single sharedtrunked system which shall host all three operating entities of the District (Bridge, Bus Transit, FerryTransit). When combined, the existing radio systems of the District hosts nearly 1200 subscriber unitsand we have a desperate need to add subscribers to support safety and protection operations aroundthe District. In addition, the District is in advanced discussions with external federal, state and localpublic safety and transportation entities who have expressed interest in utilizing this system to supporttheir respective operations.
This Golden Gate Bridge Highway and Transportation District 700 MHz application is for a two (2) zonesimulcast system utilizing five (5) transmitter and receiver locations and twelve 700 MHz channel pairfrom Region 6 700 MHz Bay Area allotments. The system service area is identified as:
San Francisco City and County
Contra Costa
Marin County
Sonoma County
Napa County
Mendocino County
Del Norte County
The Golden Gate Bridge and all waterways of the San Francisco Bay to the Pacific Ocean.
System Sites, Parameters and Characteristics
Site Name ERP [W] Lat Lon AGL [ft] GL [ft] HAAT [ft] AzimuthBald Pk 200.5 37‐53‐00.8 N 122‐13‐18.4 W 50.00 1840.55 1458.29 231.0Big Rock‐A 9 (N) 250.1 38‐03‐33.2 N 122‐36‐15.3 W 90.00 1850.39 1477.29 0.0Big Rock‐B 9 (SW) 250.1 38‐03‐33.2 N 122‐36‐15.3 W 90.00 1850.39 1477.29 238.0Mt Tam 294.9 37‐55‐43.9 N 122‐35‐14.3 W 50.00 2329.40 2011.79 143.0Sonoma Peak 282.0 38‐20‐53.8 N 122‐34‐41.1 W 150.00 2427.82 1974.63 310.0Toll Plaza 200.1 37‐48‐26.5 N 122‐28‐34.6 W 50.00 203.41 126.22 180.0
The Golden Gate Bridge Highway and Transportation District 700 MHz application, June 2009 Page 3
Polygon utilized in GoldenGate Bridge District 700 MHz
system Design
The Golden Gate Bridge Highway and Transportation District 700 MHz application, June 2009 Page 4
700 MHz Channel Plan
700 MHz channel availability in Region 6 has been developed with the intent that channels are to beutilized in an interference‐based methodology rather than a high site, noise limited methodology. TheGolden Gate Bridge District (GGBD) application is dual zone simulcast with emphasis on wide areacoverage rather than coverage based on a single county. Subsequently, establishing a wider area ofoperation over the entire region results in larger interference contours being established. The contoursresulting from the simulcast zones in this application are larger than those anticipated when initiallypacking the Region 6 700 MHZ channels.
Having 700 MHz system coverage over a wider area than initially anticipated can benefit other users inthe region as well. A public safety grade radio system with wider area coverage in the San Francisco BayArea can potentially facilitate interoperability between greater numbers of agencies taking advantage ofthe system’s larger footprint and access to wide area, multi‐county system coverage can also provide adegree of redundancy to agencies depending on county based coverage throughout the area.
700 MHz channel reuse recommendations from the National Coordination Committee, a FederalAdvisory Committee convened by the FCC to develop the rules and system criteria for the public safety700 MHZ band, recommend the utilization of contours to determine adjacent and co‐channel 700 MHzchannel reuse. Interference contours (5 dBu F50, F50), Service Contours (40 dBu F50, F50) and AdjacentChannel contours (60 dBu F50, F50) are used to ensure that the Adjacent Channel Contour isapproximately 20 dB above the 40 dBu Service Contour, at 60 dBu.
For co‐channel assignments, the 40 dBμ service contour is allowed to extend beyondthe defined service area by 3 to 5 miles, depending on the type of population densitythe application represents: urban, suburban or rural.
The co‐channel 5 dBμ interfering contour of the system being reviewed (applicant) willbe allowed to touch but not overlap the 40dBμ service contour of the system beingprotected (victim). All contours are (50, 50).
F dj d l h l h 60 dB i f i f h
The Golden Gate Bridge Highway and Transportation District 700 MHz application, June 2009 Page 5
The impact of the interference contours created in Zone 1 and Zone 2 are:
Zone 1 Interference Contour is larger than the Zone 2 Interference Contour with a greater co‐channelimpact.
Both Interference Contours completely encompass the entire area of the following counties:
San Francisco, Alameda, Contra Costa, Solano, San Mateo, Santa Cruz, Sonoma, Napa, Lake, Colusa, Yolo
One or both interference contours partially encompass a portion of the following counties:
Santa Clara, San Benito, Monterey, Mendocino, Glenn, Sutter, Sacramento, Stanislaus, San Joaquin,Butte, Merced, Calaveras, Placer, Yuba
The contours for GGBD Zone 1 and Zone 2, as a limiting factor, similarly affect many of the samecounties within Region 6 (See Interference Contours for Zone 1 and Zone 2 below). When selectingchannels for use in the GGBD application, golden Gate Bridge Highway and Transportation District hasconsidered the aggregate interference contours of the two (2) simulcast zones and their impact on co‐channel and adjacent channel users. For each channel pair selected, we have identified the co‐channeland adjacent channel users impacted in the region. The following 700 MHz General Use channel pairhave been selected from Bay Area allotments and are viable candidate frequencies for this GGBDapplication. They have been measured against each other and the regional plan to determine which hasthe least impact to remaining co‐channel and adjacent channel allotments and channel availability forfuture applicants in the region.
Zone 1 19‐20 161‐162 259‐260 373‐374 701‐702 839‐840
Zone 2 97‐98 201‐202 405‐406 299‐300 679‐680 741‐742
We have documented the implementation of each of the channels selected in this application againstother co‐channel and adjacent channel allotments in Region 6 to allow for the region to interpret theapplication’s impact. Co‐channel counties that are completely encompassed by a 5 dBu interferencecontour may have extremely limited use of that co‐channel channel allotment in their county.
The Golden Gate Bridge Highway and Transportation District 700 MHz application, June 2009 Page 6
Zone 1
Zone 1 19‐20 Co‐channel Counties Adjacent Channel Counties
Madera Sacramento (17‐18)
Placer San Benito (17‐18)
Santa Clara San Mateo (17‐18)
Sonoma
Summary: Co‐channel counties completely encompassed by Zone 1 interferencecontour are Santa Clara and Sonoma. Placer County allotments arepartially encumbered by the Zone 1 interference contour. MaderaCounty co‐channel use is not impacted.
There are no adjacent channel county allotments completelyencompassed by Zone 1 service contour. San Mateo County is partiallyencumbered by the Zone 1 service contour on channel 17‐18. Adjacentchannel allotments in Sacramento and San Benito counties on channel17‐18 are not impacted by this application.
Zone 1 161‐162 Co‐channel Counties Adjacent Channel Counties
Kings Alameda (163‐164)
Madera Fresno (163‐164)
Santa Clara Lake (163‐164)
Solano
Summary: Co‐channel counties completely encompassed by the Zone 1interference contour are Santa Clara and Solano. Kings andMadera Counties are not impacted by this application at all.
Adjacent channel counties partially impacted by the Zone 1service contour are Alameda and Lake counties. Fresno County isnot impacted at all by this application.
The Golden Gate Bridge Highway and Transportation District 700 MHz application, June 2009 Page 7
Zone 1 259‐260 Co‐channel Counties Adjacent Channel Counties
Kings Contra Costa (257‐258)
Napa Merced (257‐258)
Placer Tulare (257‐258)
Stanislaus
Summary: Co‐channel county allotment completely covered by Zone 1 interference contouris Napa. Co‐channel counties partially covered by the contour are Stanislaus andPlacer counties. Kings county allotment is not impacted by this application.
Adjacent channel allotments in Contra Costa County are partially impacted bythe Zone 1 service contour. Adjacent allotments in Merced County and TulareCounty are not impacted at all by the Zone 1 service contour.
Zone 1 373‐374 Co‐channel Counties Adjacent Channel Counties
The Golden Gate Bridge Highway and Transportation District 700 MHz application, June 2009 Page 8
Madera Santa Cruz (371‐372)
Napa Tulare (371‐372)
Santa Clara Yolo (371‐372)
Alameda (375‐376)
Fresno (375‐376)
Lake (375‐376)
Summary: Co‐channel allotments completely impacted by Zone 1 interference contour areNapa and Santa Clara. Madera County co‐channel allotment is not impacted bythis application. Adjacent channel allotments partially impacted by the Zone 1service contour are Alameda and Lake. Adjacent allotments in Santa Cruz, Yolo,Fresno and Tulare counties are not impacted by this application whatsoever.
The Golden Gate Bridge Highway and Transportation District 700 MHz application, June 2009 Page 9
Zone 1 701‐702 Co‐channel Counties Adjacent Channel Counties
Madera Alameda (703‐704)
Santa Clara Fresno (703‐704)
Sonoma Lake (703‐704)
Summary: Co‐channel county allotments completely impacted by the Zone 1 interferencecontour are Santa Clara and Sonoma. Madera County is in no way impacted bythis application.
Adjacent channel allotments partially impacted by the Zone 1 service contourare Alameda and Lake. Adjacent allotment in Fresno County is not impacted bythis application.
Zone 1 839‐840 Co‐channel Counties Adjacent Channel Counties
Napa Kings (837‐838)
Placer Mariposa (837‐838)
Stanislaus Sacramento (837‐838)
San Mateo (837‐838)
Tehama (837‐838)
Summary: The co‐channel county allotment completely impacted by the Zone 1interference contour is Napa. Co‐channel allotments partially impacted by thecontour are in Placer and Stanislaus.
Adjacent channel allotment partially impacted by the Zone 1 interferencecontour is San Mateo. Adjacent channel allotment in Sacramento, Tehama.Kings and Mariposa counties are not impacted whatsoever by the Zone 1 servicecontour.
The Golden Gate Bridge Highway and Transportation District 700 MHz application, June 2009 Page 10
ZONE 1 Interference Contour
The Golden Gate Bridge Highway and Transportation District 700 MHz application, June 2009 Page 11
The Golden Gate Bridge Highway and Transportation District 700 MHz application, June 2009 Page 12
ZONE 2
Zone 2 97‐98 Co‐channel Counties Adjacent Channel Counties
San Francisco Monterey (95‐96)
Sacramento (95‐96)
San Mateo (95‐96)
Madera (99‐100)
Placer (99‐100)
Santa Clara (99‐100)
Solano (99‐100)
Summary: The co‐channel allotment completely impacted by the Zone 2 interferencecontour is San Francisco County.
San Mateo county adjacent channel allotment is the only allotment partiallyimpacted by the Zone 2 service contour. Solano, Monterey, Sacramento, PlacerSanta Clara and Madera adjacent channel allotments are not in any wayimpacted by this application.
Zone 2 201‐202 Co‐channel Counties Adjacent Channel Counties
The Golden Gate Bridge Highway and Transportation District 700 MHz application, June 2009 Page 13
Colusa Glenn (203‐204)
Contra Costa Monterey (203‐204)
Merced Napa (203‐204)
Summary: The Co‐channel county allotments completely impacted by the Zone 2interference contour are Colusa and Contra Costa. The Merced co‐channelallotment is not impacted by this application.
Adjacent channel county allotment partially impacted by the Zone 2 interferencecontour is Napa. Adjacent channel county allotments in Monterey and Glenncounties are not impacted at all by the service contour of Zone 2.
Zone 2 405‐406 Co‐channel Counties Adjacent Channel Counties
San Francisco Mendocino (403‐404)
San Joaquin Napa (403‐404)
Stanislaus (403‐404 407‐408)
Santa Cruz (407‐408)
The Golden Gate Bridge Highway and Transportation District 700 MHz application, June 2009 Page 14
Yolo (407‐408)
Summary: The Co‐channel allotment completely impacted by the Zone 2 interference
Contour is San Francisco. San Joaquin co‐channel county allotment is partiallyimpacted by the Zone 2 interference contour.
Adjacent channel allotments partially impacted by the Zone 2 service contour isNapa county. Mendocino, Stanislaus, Santa Cruz and Yolo adjacent countyallotments are not impacted by the Zone 2 service contour.
_____________________________________________________________________________________
Zone 2 299‐300 Co‐channel Counties Adjacent Channel Counties
San Francisco Monterey (297‐298)
Santa Cruz San Joaquin (297‐298)
San Mateo (297‐298)
Summary: Both San Francisco and Santa Cruz channel allotments arecompletely impacted by the Zone 2 interference contour.
The adjacent channel allotment partially impacted by the contouris San Mateo. Adjacent channel allotments in San Joaquin andMonterey counties are not impacted by the Zone 2 servicecontour.
The Golden Gate Bridge Highway and Transportation District 700 MHz application, June 2009 Page 15
Zone 2 679‐680 Co‐channel Counties Adjacent Channel Counties
San Benito Contra Costa (677‐678)
Sonoma Kings (677‐678)
Madera (677‐678)
Summary: Sonoma County channel allotment is completely impacted by theZone 2 interference contour. San Benito co‐channel allotment ispartially impacted by the contour.
Adjacent channel allotment in Contra Costa County is partiallyimpacted by the Zone 2 service contour. Kings and Maderachannel allotments are not impacted at all by this application.
Zone 2 741‐742 Co‐channel Counties Adjacent Channel Counties
Colusa Monterey (743‐744)
The Golden Gate Bridge Highway and Transportation District 700 MHz application, June 2009 Page 16
Contra Costa San Joaquin (743‐744)
Merced Yuba (743‐744)
Summary: Co‐channel allotments in Colusa and Contra Costa County arecompletely impacted by the Zone 2 interference contour. Co‐channel allotments in Merced County are not impacted by thisapplication.
Adjacent channel allotments in Monterey, San Joaquin and Yubacounties are in no way impacted by the Zone 2 service contour.
ZONE 2 Interference Contour
The Golden Gate Bridge Highway and Transportation District 700 MHz application, June 2009 Page 17
The Golden Gate Bridge Highway and Transportation District 700 MHz application, June 2009 Page 18
Number of channel allotments per county, Region 6 prior to Golden Gate BridgeDistrict application
County Existing allotments Allotments available after GGBD application Vs 3
Alameda 57 54 (minus 3 adjacent channels)
Alpine 11 11
Amador 8 8
Butte 17 17
Calaveras 9 9
Colusa 33 32 (minus 1 co‐channel)
Contra Costa 40 37 (minus 2 adjacent and 1 co‐channel)
Del Norte 12 12
El Dorado 18 18
Fresno 51 51
Glenn 14 14
Humboldt 17 17
Inyo 8 8
Kings 18 18
Lake 54 51 (minus 3 adjacent)
Lassen 9 9
Madera 52 52
Marin 27 27
Mariposa 15 15
Mendocino 36 36
Merced 37 37
The Golden Gate Bridge Highway and Transportation District 700 MHz application, June 2009 Page 19
Modoc 11 11
Mono 7 7
Monterey 37 37
Napa 30 25 (minus 3 co‐channel and 2 adjacent)
Nevada 10 10
Placer 29 27 (minus 2 co‐channel)
Plumas 6 6
Sacramento 47 47
San Benito 18 17 (minus 1 co‐channel)
San Francisco 31 28 (minus 3 co‐channel)
San Joaquin 31 30 (minus 1 co‐channel)
San Mateo 41 37 (minus 4 adjacent)
Santa Clara 57 53 (minus 4 co‐channel)
Santa Cruz 29 28 (minus 1 co‐channel)
Shasta 21 21
Sierra 5 5
Siskiyou 11 11
Solano 26 25 (minus 1 co‐channel)
Sonoma 37 34 (minus 3 co‐channel)
Stanislaus 27 25 (minus 2 co‐channel)
Sutter 10 10
Tehama 12 12
Trinity 9 9
Tulare 28 28
Tuolumne 8 8
Yolo 19 19
Yuba 11 11